<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRoleDialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">
                  {{ item1.authName }}
                </el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col span="19">
                <!-- 通过for循环嵌套渲染二级嵌套 -->
                <el-row
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      type="warning"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template width="250px" slot-scope="scope">
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="showEditRolesDialogVisible(scope.row.id)"
              >编辑</el-button
            >
            <el-button
              size="mini"
              type="danger"
              icon="el-icon-delet"
              @click="deleteRoles(scope.row)"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <el-dialog
      title="修改角色"
      :visible.sync="editRolesDialogVisible"
      width="40%"
    >
      <!-- 内容主体区域 -->
      <el-form
        :model="editRolesForm"
        :rules="addFormRules"
        ref="editFormRef"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRolesForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRolesForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editRolesDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRolesInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 添加用户的对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addRoleDialogVisible"
      width="40%"
      @close="setRoleDialogClosed"
    >
       <!-- 内容主体区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      >
      </el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点的id值数组
      defKeys: [],
      roleId: '',
      // 控制添加用户对话框的显示与隐藏
      addRoleDialogVisible: false,
      editRolesDialogVisible: false,
      // 添加角色的表单数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加角色的表单的验证规则对象
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          {
            min: 3,
            max: 9,
            message: '角色名称长度在 3 到 9 个字符',
            trigger: 'blur'
          }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          {
            min: 2,
            max: 9,
            message: '角色描述长度在 2 到 9 个字符',
            trigger: 'blur'
          }
        ]
      },
      //  存储查询到的角色信息对象
      editRolesForm: {}
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      } else {
        this.rolelist = res.data
      }
    },
    // 根据Id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该权限, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除！')
      } else {
        const { data: res } = await this.$http.delete(
          `roles/${role.id}/rights/${rightId}`
        )
        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败！')
        } else {
          this.$message.success('删除权限成功')
          role.children = res.data
        }
      }
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取用户权限失败')
      } else {
        // 把获取到的权限数据保存到 rightlist 中
        this.rightslist = res.data
        // 递归获取三级节点的id
        this.getLeafKeys(role, this.defKeys)
      }
      this.setRightDialogVisible = true
    },
    // 通过递归的形式,获取角色下所有三级权限的id，并保存到 defKeys 数组中
    getLeafKeys(node, arr) {
      // 如果当前 node 节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      } else {
        node.children.forEach(item => this.getLeafKeys(item, arr))
      }
    },
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击，为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      } else {
        this.$message.success('分配权限成功')
        this.getRolesList()
        this.setRightDialogVisible = false
      }
    },
    // 添加角色
    addRole() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        // 可以发起添加用户的网络请求
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) {
          this.$message.error('添加用户失败')
        } else {
          this.$message.success('添加用户成功')
          // 添加成功时隐藏对话框
          this.addRoleDialogVisible = false
          // 重新获取用户的列表
          this.getRolesList()
        }
      })
    },
    // 添加角色的对话框关闭时清空对话框里面的内容
    setRoleDialogClosed() {
      this.addForm.roleName = ''
      this.addForm.roleDesc = ''
    },
    // 展示编辑角色的对话框
    async showEditRolesDialogVisible(id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('角色信息查询失败')
      } else {
        this.editRolesForm = res.data
        this.editRolesDialogVisible = true
      }
    },
    // 编辑角色表单的提交
    async editRolesInfo() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) {
          return 0
          // 发起修改用户信息的数据请求
        } else {
          const { data: res } = await this.$http.put(
            'roles/' + this.editRolesForm.roleId,
            {
              roleName: this.editRolesForm.roleName,
              roleDesc: this.editRolesForm.roleDesc
            }
          )
          // 更新用户失败
          if (res.meta.status !== 200) {
            return this.$message.error('更新用户信息失败')
          } else {
            // 更新用户成功
            // 关闭对话框
            console.log(res)
            this.editRolesDialogVisible = false
            // 刷新用户列表
            this.getRolesList()
            // 提示用户更新成功
            this.$message.success('更新用户信息成功')
          }
        }
      })
    },
    // 删除角色
    async deleteRoles(role) {
      const { data: res } = await this.$http.delete(`roles/${role.id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除角色失败')
      } else {
        this.$message.success('删除角色成功')
        this.getRolesList()
      }
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
